1994

8.3

1995

5.3

1986

4.0

2001

8.1

1983

5.2

1987

7.3

2004

7.3

1999

7.7

2002

7.0

2005

7.4

2002

8.2

2006

7.1

1992

7.1

1990

7.1

2006

6.1

2019

7.9

1999

7.1

6.7

1993

7.7

2000

6.2